I think its the size of food. The old time coke bottles where 8 fl oz (.23 liters). Then cans at 12 oz. Now the single serve bottles are typically 20 oz (.6 l

I think its the size of food. The old time coke bottles where 8 fl oz (.23 liters). Then cans at 12 oz. Now the single serve bottles are typically 20 oz (.6 liter) I was in NYC which labels calories in restaurants. Was a little bit of an eye opener. oversize bagels and muffins making breakfast approach half your daily caloric intake.